//此方法不支持IE浏览器
//Deno读写文件可能会经常用到
var TxtEn = new TextEncoder()
var Uint8Array = TxtEn.encode("字符串")
console.log(Uint8Array)		//[229, 173, 151, 231, 172, 166, 228, 184, 178]

//解码
var TxtDn = new TextDecoder()
TxtDn.decode(Uint8Array)	//"字符串"